Cylinder press



June 23, 1925.

J. C. E. BOURASSA 'CYLINDER Pss F'iled'June 4, 1923 4 Sheets-Sheet J Il, 1I@

June 23, l. 925.

J. C. E. BOURASSA CYLINDER PRESS Filed June 4, 1925 4 Sheets-Sheet 2 fagmfma Mir/vx.

June 23, 1925.

J. C. E. BOURASSA CYLINDER PRESS 4 Sheets-Sheet 5 Filed June 4, 1923 wmf www June 23, 1925.

J. C. E. BOURASSA CYLINDER 'PRESS Filed June 4,' 1923 4 Sheets-Sheet 4 Patented June 23, 1925.

JOSEPH' oYmnLEEivrrLEBonnAssA, or MONTREAL, QUEBEC, CANADA.

l CYLINDER rnnss.

Application. le'dfJulne 4l,

To all @071.01m itma'g/ concern:- y i Be rit lknown that I, JOSEPH GYRILLE EisrILn-BOURAssA, a subject of the :King of Great Britain, residingat'Montrealiin the. Province of Quebec, Canada, have invented certain new and useful Improvementsv in Cylinder Presses, of which Athe'Y following lis a specification. V

My invention relates toprintino presses and more particularly to that'type' avinga reciprocatingbed, a rotating cylinder and movable ink distributing rollers, the main object' beingftoprovide a' press capable of relatively Ahigh speedby reducing thefkineti'c energy of thebed, ,anothermobject being,v to provide means' whereby. the cylinder ,practically at rest when vbeing fed:` i i Ai further object is topr'ov'ide apress relativelylighter, smaller and more rigid for a given capa-city. i i 'f I obtain thesefobjectsgby reducing the travel of theV bed "onthe vreverse stroke in meeting' the forrnbylthe' a-dvanceinent'oflthe ink distributing rollersffthatY is, reducing this partof the'stroke which jis used lfer ink-ing purposes 'by "advancing therolle'rsinstead. This is Vmostisuccessfully`- performed bythe use of my means. for convert'ing rotary motionfinto.reciprocal motion asfdescribed in my application iledin'the United Statesr Patent.r Ofice on. the/21st? day of March, .1923, bearing SerialiNumberj 6,226,621, which means` are .also employedv inmy .copending application for patent'for printing presses, Serial Number 643,286, filedJ'une 4t.11,1923 Toreduce the stroke of thev-fbe'dhtheink distributing Vrollersv must be` advanced 'so' as to practically cover the wholeform immediat'elyaft er the {cylinder-has ,covered it;w This Vhas heretofore `been thought impossible` as the cylinder was found tobe inthe way of the'.v rollers. `To"obviateV thisgdrawback, vI have. provided means f whereby thefrollers are advanced to A,the Edesired point'nndeifneat-h the.` cylinderby lifting Ethe lattenl out ofthe way. n A Y i i In order tobe `more explicit, I hereafter describe oneV embodiment, as shown .inthe accompanying'. drawings, which represent as Vmuch Aof a reciprocating biedl printing press asis necessary Vto yillustrate .my 4vinvention, and. in" which similar symbols of" reference 19,23: .serial jN'o; V64;28511 refer to corresponding parts throughout the different views: i e

Figure 1 'is a conventional side elevation of a printing liftingfmeans. y,

' Figure 2 is a sideview of a portion of the pnintingpress shown in FigureI with the cylinder in raised position;

Figure 3 is a corresponding view as shown in Figure'Q- showing-in addition the cylinder driving means. f

Figure 1 is a longitudinall sec-tion of the press-illus'trating the'l bed and'ryollers actuating means.

Figure 5 is a. view showing theposition of the cylinder and the rollersY during' the.' inking operation, and

`VrFigure 6 is a graphic representation-ofthe relative strokes ofthe bdsof two presses, one vof which beingl constructed as pery my invention. 7 f Referring tothe drawings, .8 -is vthe `frame having an'A upper structurev formed! ofY two press, VVVshowing :the cylinder vertical guides'f)V intended tol receive the bearing- 10for-the shaft 11, supportingand actuating cylinder Y'12. VThis arrangement. permits vert-ical movement'v ofithe cylinder 12 vNumeral 113 indicates the bed, resting on rails, one of whichlisfindicated-by^14.

' The cylinderlifting means comprise a mounted on ashaftl 16' which actlu-y ates Y-t-hev same and isv substantiallyV geared to the bed driving-meansdescribedvlater on. 'GonneetedtotheQb'earing10 by twofrods 17 are two blockslSand 19". Block 18,1 which is guided v1in' vertical guides 20, is :provided with a roller-2lfwhich rests over-the cam 15. The block 192held2between vertical members 22ofthevframe Gais provided with arollefr '23 resting on the lundersideof the cam 1 5. Itis easily seen: thatV when ther cam 15 is set `in motion thecylinderwill remain in low ered'position while .thelportion db of the cam passes over roller-23'as in Figurel andy remains in raised positionv while-the portion reorff the -cam'VwillV passA under the roller 21, vas slidwn in Figure 2. :This whole arrangement is duplicated o-n the othery side ofy the! press. i'

The cylinder isdriven from the cam shaft .byfmeans ofthreegear wheels, gear 2 4 being -rigidlymounted `on'shaftV 16' andg'ear 25mgfidly' mounted on shaftl 11. The third'vv gear 26 is held in engagement with gears 24 and on a stub shaft 27 held by radial arms 28 and 29 bearing at one end on shafts ll and 16, respectively. This arrangement permits positive engagement of the cylinder with the cam shaft throughout its lifting and lowering movements.

The angle of lifting portion c of cam l5 is such that the cylinder will rise at the same velocity as that of the circumference of gear 24. This will cause the cylinder* to ceaseV rotating on its up motions. The sheet to be printed may be fed to the cylinder just as it reaches its upper position as it is then starting to rotate slowly.

Referring to Figure 4, the reciprocating means for the bed and the rollers comprise athreaded shaft 30. This shaft is supported in the ends of the frame and held therein by means of nuts 30h and loclinuts 30C, the thrust being taken by antifriction bearings 301. The thread is continuous so that the rotation of the shaft will impart a reciprocating motion to the bed through shoe 3l mounted therein and to the ink distributing rollers through shoe 32, mounted in cross bar 33 integral with frames 34, as shown in Fig. 4. It will be seen that the shoes are laced in thethread at different angles so that the bed and the rollers will reciprocate in opposite directions asy shown in Fig. 4. The means for rotating shaft 3() comprise a worm gear 86thereon driven by a worm 37 mounted on a shaft 38 supported in the main frame as shown. The cylinder and its lifting means are driven by a gear on the' cam shaft 16 and a gear on shaft 38 to which power is applied.

As shown in Fig. 4, the smaller end of shaft 30 has a thread 30a. This thread is intended to actuate and keep in proper place, antifri'ction rollers, not shown, between the frame and the bed, and also between the frame and the inlring rollers carriage. The shoe 3la drives the bed rollers and the shoe 32El drives the carriage rollers.

In operation, referring to Figure 5, the bed is starting towards the cylinder and consequently the rollers are just starting in the opposite direction, making room, for the cylinder which is starting ina downward direction. When the cylinder is in its lowered position, the form indicated by will just come in contact with the cylinder while Vthe rollers will travel over the distributing table and the printing will follow until the three named elements reach the positions shown in Figure l, when the cylinder will start on its upward motion to free the form on the reverse motion of the bed while the rollers will pass over the distributing table, over the` form, the three elements assuming their former position as in Figure 5.

An approximate figure of the bed travel saved with my invention may readily be seen by referring to Figurev 6, which shows in comparison the travel of two beds, as follows: C represents the cylinder of an ordinary press, 7 its stationary rollers, II the bed before printing, and K the position after printing and inlring. In a press as per my invention, the bed will be in the same position as I-I before printing; after printing the cylinder will rise to 0 but as the rollers will move forward to S, the bed will have to reach but to T in order to be properly inked. It is therefore evident that the distance between V and X is a saving in travel which when converted Vinto speed will increase the output of the press by a large percentage. Should not speer be the requirement, this gain in space may be used for more elaborate ink distribution and therefore give superior print results.`

l. In a press the combination of a reciprocating bed, reciprocating ink distributing rollers, and a cylinder, the said cylinder re' tracting from said bed to permit the said distributing rollers to pass thereunder while reciprocating over said bed.

2. In a press the combination of a reciprocating bed, a cylinder, andinkdistributing rollers, means whereby the cylinder may be raised from said bed and means to reciprocate said distributing rollers over the said bed under the said cylinder.

3. In a press the combination of a reciprocating bed, a cylinder adapted to be lifted perpendicularly of said bed, and distributing rollers reciprocating over said bed underneath said cylinder when the said cylinder is in lifted position.

' 4. In a press the combination of a reciprocating bed, a cylinder and ink distributing rollers, means to lift said cylinder, means 'to rotate said cylinder and means to reciprocate said distributing rollers over Vsaid bed, the said rollers travelling under said cylinder when said cylinder is in lifted position.

5. In a press the combination of a recipvrocating bed, a cylinder and distributing rollers, cam lifting means for said cylinder,

,reciprocating means for said rollers, said rollers travelling over said bed between said cylinder and said bed when the said cylinder is lifted.

6. In a press the combination of a reciprocating bed, a cylinder and ink distributing rollers, cam lifting means for said cylinder to permit said distributing rollers to reciprocate thereunder, and driving means dependentonrsaid cam lifting means for controlling the rotation of said cylinder.

7. In a press the combination of a reciprocating bed, a cylinder and ink distributing rollers, the said cylinder' adapted to be lifted from said bed to allow the said distributing rollers to travel thereunder, driving means for said cylinder, said driving means arresting the rotation of said cylinder on its lifting motion.

8. In a press the combination of a reciprocating bed, a cylinder and ink distributing rollers, the said cylinder adapted to be lifted to allow the said distributing rollers to reciprocate thereunder, driving means comprising a gear mounted on the said cylinder, a driving' gear and an intermediate gear and radial means to retain said intermediate gear in engagement with the said driving gear and the said gear on the cylinder.

9. In a press the combination of a reciprocating bed, a cylinder and ink distributing rollers, the said cylinder adapted to reciprocate perpendicularly of said bed, reciprocating means for said distributing rollers, said distributing rollers reciprocating under said cylinder when same is in a remote position from said bed, and driving means l for said cylinder.

10. In a press the combination of a reciprocating bed, acylinder and ink distributing rollers, means to reciprocate said rollers in opposite direction to said bed, cam means to hold the said cylinder in .lowered position on the printing stroke ofthe bed and in a lifted positionon the retracting stroke of the bed, allowing the said rollers to pass under said cylinder, means to rotate said cylinder, the said roller reciprocating means,

cam means, and cylinder rotating means be- 1iong dependent on the motion of the said 11. In a printing press, the combination of a reciprocating bed, reciprocating ink distributing rollers, and a cylinder, said cylinder and bed being relatively movable to permit said distributing rollers to pass unge said cylinder while traveling over said l2. In a printing press, the combination of a movably mounted bed, movably mounted inking means, and a cylinder, said bed, said means, and said cylinder having relative movements with respect to each other whereby the extent of travel of the bed is reduced.

13. In a printing press, the combination of a movably mounted bed, movably mounted inking means, and a cylinder, said bed, said means, and said cylinder having relative movements with respect to each other whereby the extent of travel of the bed is reduced commensurate to the travel of said inking means.

In testimony whereof, I have aiiXed my l signature hereto, in the subscribing witnesses.

JOSEPH CYRILLE EMILE BOURASSA.

presence of the two Witnesses GEO. E. GRAVEL, RAOUL LAooMBE. 

